Eisner LLP and Amper Politziner & Mattia LLP reportedly plan to merge, expanding the two firms’ presence across New York and New Jersey.

The combined firms would be known as Eisner Amper and would have approximately 1,200 employees, according to NJBIZ. Spokespeople for Eisner and Amper declined to comment to WebCPA.

Eisner, based in New York, already has an office in Florham Park, N.J., as well as Long Island and the Cayman Islands, but the merger with Edison, N.J.-based Amper would expand its client base considerably in the Garden State. Amper too has offices in New York City and Westchester, as well as Pennsylvania. But the combination of the two firms would give them a larger presence in each other’s home state.

Eisner ranked 24th on Accounting Today’s 2010 list of the Top 100 Firms, with $133.25 million in revenue, while Amper ranked 26th with $119.90 million in revenue.

Amper merged in 2008 with Goldenberg Rosenthal LLP, giving the firm an office in Pennsylvania.

“It is rare that two firms of this size can come together and have so much in common,” said PDI Global Inc. CEO Allan D. Koltin, who has consulted with both firms and worked on the Amper-Goldenberg Rosenthal merger. “The two firms spent many years together in Baker Tilly and through that association got to know each extremely well. They will probably be able to integrate much faster and easier than other mergers of this size. For Amper, growing New York City was a major strategic initiative and by combining with Eisner they achieve that goal the day after. For Eisner, they pick up some exceptional niches from Amper and will also be able to take some of their niches into the New Jersey and Philadelphia markets. At $250 million in fees throughout New York, New Jersey and Philadelphia, they will be recognized as a powerhouse the day after the merger.”